JPS6315972B2 - - Google Patents
Info
- Publication number
- JPS6315972B2 JPS6315972B2 JP5289084A JP5289084A JPS6315972B2 JP S6315972 B2 JPS6315972 B2 JP S6315972B2 JP 5289084 A JP5289084 A JP 5289084A JP 5289084 A JP5289084 A JP 5289084A JP S6315972 B2 JPS6315972 B2 JP S6315972B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- temperature
- deviation
- zone
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 19
- 239000000498 cooling water Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Control Of Heat Treatment Processes (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、物体を一定温度に加熱し、冷却して
均一の温度に制御する方法に関し、特に、加熱ム
ラ及び一定パターンの外乱が繰り返される系の制
御冷却制御方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method of heating an object to a constant temperature and cooling it to control the temperature to be uniform, and in particular, the present invention relates to a method of heating an object to a constant temperature and cooling it to control the temperature to be uniform. This invention relates to a system control cooling control method.
〈従来技術〉
物体を一定温度に加熱した後、冷却し、均一温
度に制御するという冷却制御方法として、従来、
第１図に示す定流量制御を行なつていた。<Prior art> As a cooling control method that heats an object to a constant temperature and then cools it to control the temperature to be uniform,
Constant flow control as shown in Fig. 1 was performed.
第１図の系において、１は鉄等の冷却対象物
体、２は物体１の温度を計る温度検出端、３は温
度指示器、４は冷却水が流れる配管、５は冷却水
流量計、６は冷却水制御弁７を制御する冷却水流
量調節器である。 In the system shown in Fig. 1, 1 is an object to be cooled such as iron, 2 is a temperature detection end that measures the temperature of object 1, 3 is a temperature indicator, 4 is a pipe through which cooling water flows, 5 is a cooling water flow meter, 6 is a cooling water flow rate regulator that controls the cooling water control valve 7.
第１図に示す冷却制御方法は、冷却水一定流量
制御であり、初めに、物体１を別の系において加
熱し、その後、第１図に示す系に移送し、配管４
に流れる冷却水を矢印Ａ点で物体１に接触させ、
更に、物体１を矢印Ｂに示す方向に移動させて、
物体１の冷却を行なつていた。 The cooling control method shown in FIG. 1 is a constant flow rate control of cooling water, in which the object 1 is first heated in another system, then transferred to the system shown in FIG.
Let the cooling water flowing through contact object 1 at arrow A point,
Furthermore, by moving the object 1 in the direction shown by arrow B,
Object 1 was being cooled down.
この時、配管４に流れる冷却水の流量は一定に
保ち、また、物体１の温度計測はするものの、こ
の系に対するフイードバツクは行なつていなかつ
た。 At this time, although the flow rate of the cooling water flowing through the pipe 4 was kept constant and the temperature of the object 1 was measured, no feedback was provided to this system.
第２図に、物体１の冷却制御の様子を示す。こ
の図において、縦軸は温度、図の左側は物体１の
先端部分の温度、右側は物体１の後端部分の温度
である。 FIG. 2 shows how the cooling of the object 1 is controlled. In this figure, the vertical axis is temperature; the left side of the figure is the temperature at the tip of the object 1, and the right side is the temperature at the rear end of the object 1.
この図に示すように、物体の冷却目標温度を
Tsとすると、冷却前温度T1よりΔT冷却して、
冷却後の温度はT2のようになり、物体１の加熱
時のムラ及び冷却工程中の外乱については全く制
御することができなかつた。 As shown in this figure, the target cooling temperature of the object is
Let Ts be ΔT cooling from the pre-cooling temperature T 1 ,
The temperature after cooling was T2 , and it was not possible to control uneven heating of the object 1 and disturbances during the cooling process.
尚、物体１の加熱時に発生する加熱ムラは、第
２図の温度分布曲線T1に示すように、同一処理
するロツトの物体にほぼ一様なパターンで現れる
ものである。 Incidentally, the heating unevenness that occurs when heating the object 1 appears in a substantially uniform pattern in the objects of the same lot being processed, as shown by the temperature distribution curve T1 in FIG.
この冷却工程中の外乱に対しては、第３図に示
すように、冷却時の温度調節器３′の冷却温度出
力より、冷却水の流量制御を行なうカスケード制
御により解決することができる。 As shown in FIG. 3, this disturbance during the cooling process can be solved by cascade control in which the flow rate of cooling water is controlled based on the cooling temperature output of the temperature controller 3' during cooling.
第４図はこの様子を表わすものであり、冷却工
程中の外乱に対する改善がなされていることが分
かる。 FIG. 4 shows this situation, and it can be seen that the disturbances during the cooling process have been improved.
しかしながら、この第３図に示すカスケード制
御方法も、温度に対するこきざみな調整であるた
め、加熱時の大きなムラに対しては、改善するこ
とができなかつた。 However, the cascade control method shown in FIG. 3 also makes small adjustments to the temperature, and therefore cannot improve large unevenness during heating.
〈発明の目的〉
本発明は、加熱時にほぼ一定パターンで発生す
る大きなムラを除去し、物体全体を均一の目標温
度に冷却することを目的とする。<Objective of the Invention> The object of the present invention is to eliminate large unevenness that occurs in a substantially constant pattern during heating, and to cool the entire object to a uniform target temperature.
〈発明の概要〉
本発明は、物体加熱時に一定パターンで発生す
る加熱ムラに注目したもので、物体を冷却する
際、この物体を複数のゾーンに分割し、各ゾーン
毎に実際の温度値と冷却温度目標値との偏差を計
算し、この偏差を同一ロツト内の同一ゾーンにつ
いて平均し、この平均した偏差値に係数を掛けた
値をフイードフオワード制御出力として前記各ゾ
ーンのフイードバツク制御出力に加算し、この加
算値を冷却制御出力とする冷却制御方法である。<Summary of the Invention> The present invention focuses on heating unevenness that occurs in a certain pattern when heating an object. When cooling an object, the object is divided into multiple zones and the actual temperature value is calculated for each zone. The deviation from the cooling temperature target value is calculated, this deviation is averaged for the same zone in the same lot, and the value obtained by multiplying this averaged deviation value by a coefficient is used as the feedback control output for each zone. This is a cooling control method in which the added value is used as the cooling control output.
〈実施例〉 第５図を用いて、本発明の方法を説明する。<Example> The method of the present invention will be explained using FIG.
初めに、矢印Ｂ方向に移動する冷却すべき物体
１を複数のゾーン（１〜ｎ）に分け、各ゾーン毎
に温度検出端２で温度を測定し、目標温度に対す
る偏差を算出する。８１はこの偏差を算出、平均
する演算器であり、８２は演算器８１からの偏差
出力を温度調節器３′の出力に加算する加算器で
ある。 First, the object 1 to be cooled moving in the direction of arrow B is divided into a plurality of zones (1 to n), the temperature of each zone is measured by the temperature detection end 2, and the deviation from the target temperature is calculated. 81 is an arithmetic unit that calculates and averages this deviation, and 82 is an adder that adds the deviation output from the arithmetic unit 81 to the output of the temperature controller 3'.
各ゾーンの冷却後の温度をTpi（ｉ＝１〜ｎ）
とすると、ゾーン毎偏差ΔTiは次のようになる。 The temperature after cooling of each zone is Tpi (i = 1 to n)
Then, the deviation ΔTi for each zone is as follows.
ΔTi＝Tpi−Ts …(1)
更に、このゾーン毎に求めた偏差を同一ロツト
（同一処理する物体ｍ個）内において平均する。 ΔTi=Tpi−Ts (1) Furthermore, the deviations obtained for each zone are averaged within the same lot (m objects to be processed the same).
即ち、同一ロツトｊ番目のゾーンｉ番目の平均
した偏差ΔT′ijは次のようになる。 That is, the average deviation ΔT'ij of the i-th zone of the j-th lot is as follows.
ΔT′ij＝（１−α）ΔT′ij−１
＋αΔTij …(2)
ここで、ΔT′ijは同一ロツト内（ｊ−１）番目
の偏差の平均値であり、ΔTijは同一ロツトｊ番
目の温度偏差であり、αはフイルタ定数で、同一
ロツト（ｊ−１）番目の偏差値と同一ロツトｊ番
目の偏差値のどちらに重みをおくかで定まる定数
である。 ΔT′ij=(1−α)ΔT′ij−1 +αΔTij …(2) Here, ΔT′ij is the average value of the (j−1)th deviation within the same lot, and ΔTij is the average value of the (j−1)th deviation within the same lot. It is the temperature deviation, and α is a filter constant, which is determined depending on whether to give weight to the deviation value of the (j-1)th same lot or the deviation value of the jth same lot.
次に、(2)で求めたゾーン毎の平均値に対して、
ロツト毎（品種毎）に定まる係数Ｋを掛けてゾー
ン毎のフイードフオワード制御出力とする。 Next, for the average value for each zone obtained in (2),
The product is multiplied by a coefficient K determined for each lot (each product type) to obtain the feedforward control output for each zone.
即ち、フイードフオワード出力をMViとする
と、
MVi＝aKΔT′ij−１＋ｂ …(3)
が演算器８１の出力となる。 That is, when the feed forward output is MVi, the output of the arithmetic unit 81 is MVi=aKΔT′ij−1+b (3).
但し、ａ，ｂはフイードフオワード制御出力を
調整するための定数、Ｋは品種毎に定まり、温度
偏差を冷却水量に換算するための係数である。 However, a and b are constants for adjusting the feedforward control output, and K is a coefficient determined for each product type and used to convert temperature deviation into the amount of cooling water.
このように、(3)で求まるフイードフオワード制
御出力MViが演算器８１から出力され、この値
は、更に、温度調節器３′からのフイードバツク
制御出力に加算器８２において加算され、冷却水
流量調節器６に供給され、冷却水は、この出力に
よつて制御される。 In this way, the feedback control output MVi determined in (3) is output from the calculator 81, and this value is further added to the feedback control output from the temperature controller 3' in the adder 82, and the The cooling water supplied to the flow rate regulator 6 is controlled by this output.
このように、各ロツトにおける各物体のゾーン
毎の温度偏差を求め、その値を平均し、この値よ
りフイードフオワード制御出力を算出し、該当ゾ
ーンを冷却するタイミングで出力するので、同一
ロツトにおける一定パターンの加熱ムラ等の外乱
を記憶でき、常に冷却水の流量を適切に制御する
ことができる。 In this way, the temperature deviation for each zone of each object in each lot is determined, the values are averaged, and the feed forward control output is calculated from this value and output at the timing when the corresponding zone is cooled. It is possible to memorize disturbances such as heating unevenness in a certain pattern, and to always appropriately control the flow rate of cooling water.
尚、この制御を行わない場合は、ａ，ｂともに
０にすれば良く、また、ロツトの先頭にくる物体
については、このフイードフオワード制御出力は
０となる。 If this control is not performed, both a and b may be set to 0, and the feedforward control output will be 0 for the object that comes at the head of the lot.
このフイードフオワード制御を行なつた場合、
第６図に示すように物体の冷却後温度T2は加熱
ムラ及び外乱に影響を受けることなく、目標温度
Tsに近づく。 When this feed forward control is performed,
As shown in Figure 6, the temperature T 2 of the object after cooling is not affected by heating unevenness or disturbance, and reaches the target temperature.
Approach Ts.
〈発明の効果〉
以上述べたように、本発明の冷却制御方法によ
れば、物体の加熱ムラ及び外乱に影響を受けるこ
となく均一に冷却制御することができる。<Effects of the Invention> As described above, according to the cooling control method of the present invention, uniform cooling control can be performed without being affected by uneven heating of an object and disturbances.
第１図は、従来の冷却制御方法を説明するため
の図、第２図は、従来の冷却制御方法による冷却
の様子を表わす図、第３図は、従来の冷却制御方
法を説明するための図、第４図は、従来の冷却制
御方法による冷却の様子を表わす図、第５図は、
本発明の冷却制御方法を説明するための図、第６
図は、本発明の冷却制御方法による冷却の様子を
表わす図。
１……物体、２……温度検出端、３……温度指
示器、３′……温度調節器、４……冷却水配管、
５……冷却水流量発信器、６……冷却水流量調節
器、７……冷却水制御弁、８１……演算器、８２
……加算器。
Fig. 1 is a diagram for explaining the conventional cooling control method, Fig. 2 is a diagram showing the state of cooling by the conventional cooling control method, and Fig. 3 is a diagram for explaining the conventional cooling control method. 4 is a diagram showing the state of cooling by the conventional cooling control method, and FIG.
6th diagram for explaining the cooling control method of the present invention
The figure is a diagram showing the state of cooling by the cooling control method of the present invention. 1...Object, 2...Temperature detection end, 3...Temperature indicator, 3'...Temperature controller, 4...Cooling water piping,
5... Cooling water flow rate transmitter, 6... Cooling water flow rate regulator, 7... Cooling water control valve, 81... Arithmetic unit, 82
...Adder.
Claims (1)
に分割し、各ゾーン毎に実際の温度値と冷却温度
目標値との偏差を計算し、この偏差を同一ロツト
内の同一ゾーンについて平均し、この平均した偏
差値に係数を掛けた値をフイードフオワード制御
出力として前記各ゾーンのフイードバツク制御出
力に加算し、この加算値を冷却制御出力とする冷
却制御方法。1. When cooling an object, divide the object into multiple zones, calculate the deviation between the actual temperature value and the cooling temperature target value for each zone, average this deviation for the same zone in the same lot, A cooling control method in which a value obtained by multiplying this average deviation value by a coefficient is added to the feedback control output of each zone as a feedforward control output, and this added value is used as a cooling control output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5289084A JPS60197825A (en) | 1984-03-19 | 1984-03-19 | Method for controlling cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5289084A JPS60197825A (en) | 1984-03-19 | 1984-03-19 | Method for controlling cooling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60197825A JPS60197825A (en) | 1985-10-07 |
| JPS6315972B2 true JPS6315972B2 (en) | 1988-04-07 |
Family
ID=12927456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5289084A Granted JPS60197825A (en) | 1984-03-19 | 1984-03-19 | Method for controlling cooling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60197825A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0807692A1 (en) * | 1996-05-15 | 1997-11-19 | Sms Schloemann-Siemag Aktiengesellschaft | Method of cooling structural steel beams |
| DE19937764A1 (en) * | 1999-08-10 | 2001-02-15 | Loi Thermprocess Gmbh | Method and device for heat treating sheet metal |
-
1984
- 1984-03-19 JP JP5289084A patent/JPS60197825A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60197825A (en) | 1985-10-07 |
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